ClearWater Tech LLC EcoTex - Advanced Laundry Oxidation Systems Ozone Laundry Methodology

1. ClearWater Tech LLC EcoTex - Advanced Laundry Oxidation Systems Ozone Laundry Methodology

2. Overview • Type of Methods • Theory of Operation • Methodology Schematic • Advantages and Disadvantages

3. Ozone Laundry Methods • Recirculation Injection System (RI) • Direct Water Injection System (DWI) • Ozone Charge System (OC) • Ozone Diffusion System (OD)

4. Recirculation Injection System (RI) Theory of Operation • To recirculate wash water, from the washer though an ozone system and back to the washer • Ozone process oxidizes and sanitizes recirculated water and delivers dissolved ozonated water back to wash drum • Ozone recirculation takes place during each step of the wash cycle • Water is sent to drain after every step • Dissolved ozone or ORP monitors maybe used to indicate ozone’s transfer to the water

5. Recirculation Injection System - continued

6. Recirculation Injection System - continued Advantages • Continuous ozone injection to the washer in every step of the wash cycle • Direct ozone contact with linen • Beneficial disinfection • Single ozone system for all washers • Reduces; hot water, energy, chemicals, total water, time …??? Disadvantages • Large footprint (typically floor mounted components) • Complex installation - Plumbing, contact tank, pump electrical, etc. • Maintenance - Daily cleaning of filter • Higher concentrations could cause a bleaching effect • High capital cost - long payback period

7. Direct Injection System (DI) Theory of Operation • With the use of a venturi, the water is directly ozonated prior to entering the washer, to dissolve the ozone gas into the water • As the fill valve opens water flow is initiated, creating vacuum at the venturi, drawing in ozone gas • Some methods also use a contact tank • Once the washer achieves water fill capacity, fill valve closes interrupting vacuum and ozone production • Ozone enters the wash drum only upon each water fill step • Dissolved ozone or ORP monitor maybe used to indicate ozone’s transfer to the water

8. Direct Injection System- continued

9. Direct Injection System - continued Advantages • Smaller footprint than RI method • Can be wall mounted (contact tank maybe floor mounted) • Direct ozone contact with linen • Less expensive than RI method • ORP and O3 PPM monitors to confirm ozone’s transfer • Single ozone system for all washers • Reduces; hot water, energy, chemicals, over-all water, time…??? Disadvantages • Complex installation - plumbing, contact tank electrical, etc. • Single pass ozone injection and contacting • Does not provide continuous ozone induction throughout wash step (only on fill) • Capital costs can increase payback period • Increased Maintenance - pumps, plumbing leaks, controllers, etc. • Potential of uncontrolled ozone off-gas from washer • Ozone does not remain in solution

10. Ozone Charge System (OC) Theory of Operation • Same theory as DWI systems, delivers ozonated water only on fill, but allows for recirculation of water to increase ORP or dissolved ozone level • May use a single ozone system for multiple washers • May utilize a pressurized or atmospheric tank (atmospheric systems require re pressurization) • As the fill valve opens water flow is initiated, creating vacuum at the venturi, drawing in ozone gas • Once the washer achieves water fill capacity, fill valve closes interrupting vacuum and ozone production • Dissolved ozone or ORP monitor maybe used to indicate ozone’s transfer to the water

11. Ozone Charge System- continued Pressurized Tank

12. Ozone Charge System- continuedAtmospheric Tank

13. Ozone Charge System - continued Advantages • Can be a smaller foot print than the RI method • Wall mountable system (contact tank may or may not be wall mountable) • Less up front cost than RI method • Multi-pass ozone injection prior to washer • ORP and O3 PPM monitors to confirm ozone’s transfer • Single ozone system for all washers • Reduces; hot water, energy, chemicals, over-all water, time ...??? Disadvantages • Complex installation - Plumbing, electrical, etc. • Does not provide continuous ozone induction throughout wash step (only on fill) • Higher concentrations could cause a bleaching effect • High capital costs will increase payback period • Increased Maintenance - pumps, plumbing leaks, controllers, etc. • Potential uncontrolled ozone off gas from washer • Ozone does not remain in solution

14. Ozone Diffusion System (OD) Theory of Operation • To inject gaseous ozone into washer sump during each step of the wash cycle • Ozone oxidizes and sanitizes the contaminants in the water and linen in the washer • Some ozone is dissolved into the water, however most of the ozone is used is gaseous phase, as the linen fold into the gas • A signal from the washer controls ozone’s On and Off time, may be programmed by the washer’s PLC

15. Ozone Diffusion System - continued

16. Ozone Diffusion System - Continued Advantages • Continuous ozone injection in every step of the wash cycle • Direct ozone contact with linen • Increased contact time of ozone in washer, insures microbe kill • Easy installation - NO added plumbing, contact tanks, water filters, etc. • Low capital cost - short payback period 8 to 18 months • Small footprint (typically wall mounted components) • Reduces; hot water, energy, chemicals, over-all water, time Disadvantages • Systems that are not accurately sized and installed can create ambient ozone issues.

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19. Q & A